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bogdanovich [222]
2 years ago
9

Scientists hypothesize that prokaryotes evolved before eukaryotes because

Biology
1 answer:
DiKsa [7]2 years ago
4 0

Answer: e. prokaryotic cells lack nuclei.

Explanation: Prokaryotes are unicellular (single-cell) organisms that lack well developed cell internal membrane-bound structures or organelles. They do not have a nucleus but generally, they have a single chromosome that possess a double-stranded DNA located in an area of the cell called the nucleoid. Most prokaryotes have a cell wall outside the plasma membrane.

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What experiment?

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In 2019, the United Nations assembled a team of scientists to conduct the biggest ever study of
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8 0
3 years ago
PLS HELP I WILL GIVE BRAINLIST
ra1l [238]

There are four bases found in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). Adenine forms a base pair with thymine, and cytosine forms a base pair with guanine. There is a one-to-one relationship in these base pairings (Chargaff’s rule), which means that if you know the percentage of any one of them within a given DNA sample, you can calculate the percentages of the other three. In this case, you're given the percentage of guanine, and you want to find out the percentage of adenine.

Since guanine base-pairs with cytosine and since there must be as much cytosine as there is guanine, 41% of the bases in this gene are cytosine as well. That means that adenine and thymine <em>together </em>make up the remaining 18% (100% − 41% G − 41% C) of the base pairs. If there must be an equivalence in the number of thymine and adenine bases per Chargaff's rule, then half of the remaining base pairs must comprise adenine and the other half comprise thymine. Half of 18% is 9%.

Thus, adenine makes up 9% of the bases in this gene.

5 0
3 years ago
Which of the following processes does not take place during cellular respiration?
lorasvet [3.4K]
C) Hydrogen of water is separated from oxygen. DOES NOT OCCUR!
4 0
3 years ago
Read 2 more answers
Calculate the Speed - Distance = 75 miles Time = 25 minutes
Len [333]

Answer:

D. 3 mi/min

Explanation:

Given:

Distance = 75 miles

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Required:

Speed

Solution:

Formula for calculating speed = distance covered / time

Therefore:

Speed = 75 miles / 25 minutes = 3 mi/min

3 0
2 years ago
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